<template>
  <div>
    <h2>随机点名</h2>
    <div class="box">
      <span>名字是：</span>
      <div class="qs">{{name}}</div>
    </div>
    <div class="btns">
      <button @click="fn" class="start">开始</button>
      <button @click="fn1" class="end">结束</button>
    </div>
  </div>
</template>

<script>

export default {
  data() {
    return {
      arr:['黄忠','赵云','刘备','张飞','关羽'],
      name:'这里显示姓名',
      id:''
    }
  },
  methods:{
    fn(){
      if(this.id)clearInterval(this.id)
      
     this.id=setInterval(()=>{
      const i=Math.round(Math.random()*this.arr.length)
      this.name = this.arr[i]
     },50)
    },
    fn1(){
      clearInterval(this.id)
      this.arr.splice(this.name,1)
    }
  }

};
</script>

<style>
* {
  margin: 0;
  padding: 0;
}

h2 {
  text-align: center;
}

.box {
  width: 600px;
  margin: 50px auto;
  display: flex;
  font-size: 25px;
  line-height: 40px;
}

.qs {
  width: 450px;
  height: 40px;
  color: red;
}

.btns {
  text-align: center;
}

.btns button {
  width: 120px;
  height: 35px;
  margin: 0 50px;
}
</style>